== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:37:55 (1788583075)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8613 s, 8.2 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9df8919ac000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.414855
Iter 1/10: OSS cache speed: 0.35675
Iter 1/10: ladvise speed: 0.411432
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.3709
Iter 2/10: OSS cache speed: 0.418182
Iter 2/10: ladvise speed: 0.413716
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.433392
Iter 3/10: OSS cache speed: 0.439027
Iter 3/10: ladvise speed: 0.443463
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.396986
Iter 4/10: OSS cache speed: 0.444317
Iter 4/10: ladvise speed: 0.421278
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.316534
Iter 5/10: OSS cache speed: 0.39699
Iter 5/10: ladvise speed: 0.434333
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.377507
Iter 6/10: OSS cache speed: 0.421884
Iter 6/10: ladvise speed: 0.39727
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.393298
Iter 7/10: OSS cache speed: 0.393759
Iter 7/10: ladvise speed: 0.449768
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.333176
Iter 8/10: OSS cache speed: 0.418871
Iter 8/10: ladvise speed: 0.418195
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.34853
Iter 9/10: OSS cache speed: 0.350238
Iter 9/10: ladvise speed: 0.390585
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.29942
Iter 10/10: OSS cache speed: 0.371496
Iter 10/10: ladvise speed: 0.352593
Average uncached read: .36
Average speedup with OSS cached read:  .40 = +11%
Average speedup with ladvise willread:  .41 = +13%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0